This functionality is in beta and is subject to change. The design and
code is considered to be less mature than official GA features. Elastic will
take a best effort approach to fix any issues, but beta features are not
subject to the support SLA of official GA features.

The Cloud ID, which can be found in the Elastic Cloud web console, is used by
Heartbeat to resolve the Elasticsearch and Kibana URLs. This setting
overwrites the output.elasticsearch.hosts and setup.kibana.host settings.

When specified, the cloud.auth overwrites the output.elasticsearch.username and
output.elasticsearch.password settings. Because the Kibana settings inherit
the username and password from the Elasticsearch output, this can also be used
to set the setup.kibana.username and setup.kibana.password options.